Essential Chemistry for IGCSE - Particles And Purification (Section 4 - No. 2)
Which of the following statements is correct regarding melting and boiling points?
Impurities always raise both melting and boiling points.
Impurities lower the melting point but raise the boiling point.
Impurities lower both melting and boiling points.
Impurities broaden the melting range and can lower melting and increase boiling point.
Explanation
Impurities can broaden melting point and will generally lower the melting point and raise the boiling point.
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